I'm wanting to strip the paint off this metal shell, but I don't know if it's aluminum or some other metal. I have read where aluminum seems to be susceptible to corrosion/tarnishing, etc. with many of the suggested chemicals, powders, etc. found/suggested in this forum. The shell is clearly a die-cast metal, and is quite light in weight, but I guess I don't know when aluminum was introduced into the Lionel manufacturing process. Anyone?
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